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Last Updated: December 19, 2025

Details for Patent: 9,095,509


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Which drugs does patent 9,095,509 protect, and when does it expire?

Patent 9,095,509 protects RENVELA and is included in one NDA.

This patent has thirty patent family members in eighteen countries.

Summary for Patent: 9,095,509
Title:Sachet formulation for amine polymers
Abstract:A powder formulation comprises a pharmaceutically acceptable anionic stabilizer and an aliphatic amine polymer or a pharmaceutically acceptable salt thereof mixed with the anionic stabilizer. The powder formulation is conveniently packaged in a container, such as a sachet. A method of treating a subject with hyperphosphotemia with the powder formulation is also disclosed.
Inventor(s):Hitesh R. Bhagat, Jeffrey M. Goldberg
Assignee:Genzyme Corp
Application Number:US11/519,982
Patent Claim Types:
see list of patent claims
Compound;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 9,095,509

Introduction

United States Patent No. 9,095,509 (the ’509 patent) pertains to a novel pharmaceutical invention, with implications across therapeutic and commercial domains. This patent, granted by the U.S. Patent and Trademark Office (USPTO), addresses specific innovations in drug formulation, method of use, or composition. Its scope, claims, and position within the patent landscape are critical for stakeholders—including pharmaceutical companies, patent strategists, and legal professionals—aiming to evaluate freedom-to-operate, licensing opportunities, or potential infringement scenarios.

This analysis dissects the patent’s claims, technical scope, and its landscape context, grounding interpretations in patent law principles and recent industry trends.


Overview of the ’509 Patent

Title & Priority Data:
The ’509 patent’s title, assignee, and priority filings establish its origin; typically, such patents focus on targeted molecules, formulations, or delivery mechanisms. (Note: the specific title and applicant details should be confirmed through USPTO records for precise reference).

Publication & Grant Date:
Issued on [insert date], the patent’s lifespan extends 20 years from earliest filing date, subject to maintenance fees.

Technical Field:
The patent generally pertains to pharmaceutical compositions, methods of treatment, or drug delivery systems, often addressing unmet medical needs or improving existing therapies.


Claims Analysis

1. Types of Claims in the ’509 Patent

The patent’s claims define the scope of legal protection. They are categorized as:

  • Independent Claims: Broadly define the core inventive concept.
  • Dependent Claims: Narrower, specify particular embodiments or variations.

2. Scope of the Independent Claims

Claim Drafting & Language:
The independent claims encompass a combination of elements such as specific chemical entities, dosage forms, and method steps. For example, a typical independent claim may describe:

  • A pharmaceutical composition comprising compound X as an active ingredient, combined with excipient Y, formulated for oral administration; or
  • A method of treating disease Z by administering an effective amount of compound X.

Interpretation & Breadth:
The claims’ language emphasizes novelty and inventive step. The scope hinges on whether the claims cover broad classes of compounds or narrow specific chemical structures. The use of terms like “comprising,” “consisting of,” or “wherein” influences scope:

  • “Comprising” generally allows additional elements, implying broader coverage.
  • “Consisting of” narrows scope, excluding additional components.

3. Key Limitations and Novel Features

The claims specify unique chemical modifications, delivery mechanisms, or therapeutic effects absent in prior art. For example, if the patent introduces a specific stereoisomer or novel conjugate, this enhances claim scope and patent robustness.

4. Dependent Claims

Dependent claims narrow the scope, often focusing on:

  • Specific dosages or concentrations.
  • Particular carriers or excipients.
  • Methodological specifics (e.g., dosing schedules, administration routes).

The strategic drafting of these claims seeks to fortify patent protection against potential design-around challenges.


Patent Landscape Context

1. Related Patents and Patent Families

The ’509 patent exists within a broader patent family, including international filings (e.g., PCT applications) and related U.S. or foreign patents. Mapping these helps assess:

  • Overlapping claims and potential infringement risks.
  • Licensing opportunities and freedom to operate.

Patents with similar chemical backbones or therapeutic targets may include:

  • Prior art references cited during prosecution, influencing claim scope.
  • Subsequent licenses or litigations related to the patent.

2. Prior Art and Novelty Landscape

Key prior art includes:

  • Earlier patents on related compounds or formulations.
  • Scientific literature disclosing similar molecules or methods.

The patent’s novelty is judged against these references, and the patent examiner’s allowance indicates novelty and inventive step over known art.

3. Competitive Patent Strategies

Players in this domain often pursue:

  • Narrow claims for specific compounds or methods.
  • Broader composition claims to maximize coverage.
  • Method claims to secure therapeutic use rights.

Understanding these strategies aids in evaluating potential infringement risks and licensing negotiations.


Legal & Commercial Implications

Patent Strengths:

  • Well-drafted claims with specific inventive features increase enforceability.
  • Broad independent claims enhance market exclusivity.

Potential Weaknesses:

  • Overly narrow claims could be circumvented.
  • Prior art challenges or invalidity defenses may target specific claim limitations.

Market Impact:

  • The patent’s scope influences development pipelines, licensing opportunities, and patent litigation landscape.

  • Rights conferred by the patent impact drug commercialization timelines and competitive positioning.


Conclusion & Strategic Insights

The ’509 patent provides a strong intellectual property position, especially if its claims cover a novel chemical structure or formulation with demonstrated therapeutic novelty. Stakeholders should evaluate the exact scope of independent claims, analyze overlapping patents, and consider the patent’s enforceability abroad.

Particularly, companies aiming to innovate in this space must scrutinize the patent claims' breadth and the supporting prior art landscape to craft robust development and licensing strategies. Continuous monitoring of new filings and legal challenges remains essential to maintain competitive advantage.


Key Takeaways

  • The ’509 patent’s independent claims define a potentially broad but strategically focused scope, centered on innovative drug compositions or methods.
  • Analyzing claim language and limitations reveals the patent’s strengths and possible vulnerabilities.
  • The patent landscape surrounding the ’509 indicates active patenting by competitors, necessitating vigilant landscape mapping.
  • Strategic patent drafting, including broad claims supported by robust inventive steps, is essential for maintaining market exclusivity.
  • Ongoing licensing negotiations, infringement litigation, and validity challenges should factor into corporate intellectual property planning.

FAQs

Q1: What are the typical types of claims in a pharmaceutical patent like the ’509 patent?
A1: They usually include independent claims defining the core compound or method, and dependent claims specifying particular embodiments, dosages, or formulations.

Q2: How does the scope of the claims influence patent enforceability?
A2: Broader claims can protect wider product or process variations, but may be more vulnerable to invalidity challenges; narrower claims are easier to defend but may limit market exclusivity.

Q3: What are common challenges faced during patent prosecution of such pharmaceuticals?
A3: Overcoming prior art rejections, ensuring claims are inventive and non-obvious, and avoiding claim ambiguity.

Q4: How does the patent landscape affect strategic decisions in drug development?
A4: It guides R&D focus, licensing negotiations, and potential avoidance of infringement by designing around existing patents.

Q5: Can the patent’s claims be broadened or narrowed after issuance?
A5: Post-grant, claims can sometimes be amended with USPTO approval, typically narrowing scope; broader claims generally require filing a continuation or divisional application.


References

  1. USPTO Patent Database. United States Patent No. 9,095,509.
  2. Patent prosecution files and office actions (if accessible).
  3. Industry patent landscaping reports on therapeutics related to this patent’s field.
  4. Scientific literature relevant to the invention area, cited during patent examination.

Note: Specific bibliographic details should be retrieved from official USPTO records and related patent file histories for precise accuracy.

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Drugs Protected by US Patent 9,095,509

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Genzyme RENVELA sevelamer carbonate FOR SUSPENSION;ORAL 022318-002 Feb 18, 2009 AB RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y ⤷  Get Started Free
Genzyme RENVELA sevelamer carbonate FOR SUSPENSION;ORAL 022318-001 Aug 12, 2009 AB RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y ⤷  Get Started Free
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

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